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The average weight of 29 students is 28 kg. By the admission of a new student, the average weight is reduced to 27.8 kg. Find the weight of the new student?1. 21 kg2. 22.4 kg3. 22 kg4. 21.6 kg |
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Answer» Correct Answer - Option 3 : 22 kg Given: Average weight of 29 students = 28 kg Reduced average after admission of a new student = 27.8 kg Formula used: Total weight = Average × Number of students Calculation: Total weight of 29 students = 29 × 28 ⇒ 812 kg Total weight of 30 students = 30 × 27.8 ⇒ 834 kg Weight of new students = (834 – 812) kg ⇒ 22 kg ∴ The weight of new student is 22 kg |
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